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utun2/tests/test_etcp_router.c
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Evgeny 73f707ef9b crypto: migrate ECDH(secp256r1) to X25519, drop TinyCrypt 
- SC_PUBKEY_SIZE: 64 -> 32 bytes, SC_PUBKEY_ENC_SIZE: 72 -> 40
- sc_set_peer_public_key uses EVP_PKEY_derive with X25519
- sc_generate_keypair via EVP_PKEY_keygen(EVP_PKEY_X25519)
- sc_compute_public_key_from_private via EVP_PKEY_new_raw_private_key
- sc_validate_key: check non-zero (X25519 has no invalid keys)
- sc_obfuscate_pubkey: XOR now 32 bytes
- Remove all TinyCrypt code (~860 lines), always use OpenSSL
- Remove TinyCrypt from build system, drop test_crypto/test_ecc_encrypt
- Update all test keys (128 hex -> 64 hex)
- Fix bbr_integration.c split-line pubkeys
2026-06-17 21:28:07 +03:00

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// test_etcp_router.c — Unit test for etcp_router: bind/unbind, send, loopback, forward, reply
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../lib/platform_compat.h"
#include "test_utils.h"
#ifdef _WIN32
#include <windows.h>
#include <direct.h>
#else
#include <unistd.h>
#endif
#include <time.h>
#include <sys/stat.h>
#include "../src/etcp.h"
#include "../src/etcp_connections.h"
#include "../src/etcp_api.h"
#include "../src/etcp_router.h"
#include "../src/config_parser.h"
#include "../src/utun_instance.h"
#include "../src/routing.h"
#include "../src/tun_if.h"
#include "../src/secure_channel.h"
#include "../src/pkt_normalizer.h"
#include "../src/route_bgp.h"
#include "../lib/u_async.h"
#include "../lib/ll_queue.h"
#include "../lib/debug_config.h"
#include "../lib/mem.h"
#define TEST_SVC_ID 0x01
#define TEST_TIMEOUT_MS 5000
#define TOTAL_PACKETS 20
#define MAX_PAYLOAD 200
static char temp_dir[] = "/tmp/utun_test_XXXXXX";
static char server_conf[256], client_conf[256];
static struct UTUN_INSTANCE* srv = NULL;
static struct UTUN_INSTANCE* cli = NULL;
static struct UASYNC* ua = NULL;
static int g_ok = 0;
static int g_test_done = 0;
static int g_phase = 0; // 0=wait_conn, 1=fwd, 2=reply
static void* g_mon_id = NULL;
// Server config — node 0x1111...
static const char* srv_cfg =
"[global]\n"
"my_node_id=0x1111111111111111\n"
"my_private_key=38240cb82199e504686507f11f6eaa4f740fde6f0c425c495e49a523019a5d68\n"
"my_public_key=ce8871f07fa056c636d297115f231b08c29cdf94e0d440fce83a07c34416d36a\n"
"tun_ip=10.99.0.1/24\n"
"tun_ifname=tun99\n"
"[server: s1]\n"
"addr=127.0.0.1:9041\n"
"type=public\n"
"[allowed_keys]\n"
"allow_all=1\n";
// Client config — node 0x2222...
static const char* cli_cfg =
"[global]\n"
"my_node_id=0x2222222222222222\n"
"my_private_key=704f2e012c8fa8768130cb0f988a997dccb628372bc5ceccacc78dcbfec5916f\n"
"my_public_key=b3193173def895bd0fcea6f86af077c7d77216f10395275f627ac18242ec0f01\n"
"tun_ip=10.99.0.2/24\n"
"tun_ifname=tun98\n"
"[server: s1]\n"
"addr=127.0.0.1:9042\n"
"type=public\n"
"[client: c1]\n"
"keepalive=1\n"
"peer_public_key=ce8871f07fa056c636d297115f231b08c29cdf94e0d440fce83a07c34416d36a\n"
"link=s1:127.0.0.1:9041\n";
// ======================== Test state ========================
static int fwd_sent = 0, fwd_rcvd = 0;
static int reply_sent = 0, reply_rcvd = 0;
static uint8_t expected_data[MAX_PAYLOAD];
static uint64_t server_node_id = 0x1111111111111111ULL;
static uint64_t client_node_id = 0x2222222222222222ULL;
// ======================== Helpers ========================
static int conn_established(struct UTUN_INSTANCE* inst) {
if (!inst) return 0;
for (struct ETCP_CONN* c = inst->connections; c; c = c->next) {
for (struct ETCP_LINK* l = c->links; l; l = l->next) {
if (l->initialized && c->crypto_ctx.initialized) {
int ok = 0;
for (int i = 0; i < SC_SESSION_KEY_SIZE; i++) if (c->crypto_ctx.session_key[i] != 0) { ok = 1; break; }
if (ok) return 1;
}
}
}
return 0;
}
static struct ETCP_CONN* first_conn(struct UTUN_INSTANCE* inst) {
return inst ? inst->connections : NULL;
}
// ======================== Server handler ========================
static void srv_handler(struct ETCP_CONN* conn, struct ll_entry* entry) {
(void)conn;
if (!entry || !entry->dgram || entry->len < 10) { // svc_id(1) + subcmd(1) + seq(4) + data_len(4)
if (entry) { queue_entry_free(entry); queue_dgram_free(entry); }
return;
}
uint8_t subcmd = entry->dgram[1];
uint32_t seq = 0; memcpy(&seq, entry->dgram + 2, 4);
uint32_t data_len = 0; memcpy(&data_len, entry->dgram + 6, 4);
uint8_t* payload = entry->dgram + 10;
if (subcmd == 0x01) { // DATA
if (seq != (uint32_t)fwd_rcvd) {
printf("[FAIL] server: seq mismatch expected=%u got=%u\n", (uint32_t)fwd_rcvd, seq);
g_test_done = -1;
} else if (data_len > 0 && memcmp(payload, expected_data, data_len) != 0) {
printf("[FAIL] server: data mismatch at seq=%u\n", seq);
g_test_done = -1;
} else {
fwd_rcvd++;
}
queue_entry_free(entry); queue_dgram_free(entry);
// Send reply back
if (!g_test_done && reply_sent < TOTAL_PACKETS) {
uint8_t buf[10 + MAX_PAYLOAD];
buf[0] = TEST_SVC_ID;
buf[1] = 0x02; // REPLY subcmd
uint32_t rseq = reply_sent;
memcpy(buf + 2, &rseq, 4);
memcpy(buf + 6, &data_len, 4);
memcpy(buf + 10, expected_data, data_len);
struct ll_entry* re = queue_entry_new(0);
if (re) { re->dgram = u_malloc(10 + data_len); memcpy(re->dgram, buf, 10 + data_len); re->len = 10 + data_len;
etcp_route_send(srv, client_node_id, re, 0); reply_sent++; }
}
} else {
queue_entry_free(entry); queue_dgram_free(entry);
}
}
// ======================== Client handler ========================
static void cli_handler(struct ETCP_CONN* conn, struct ll_entry* entry) {
(void)conn;
if (!entry || !entry->dgram || entry->len < 10) {
if (entry) { queue_entry_free(entry); queue_dgram_free(entry); }
return;
}
uint8_t subcmd = entry->dgram[1];
uint32_t seq = 0; memcpy(&seq, entry->dgram + 2, 4);
uint32_t data_len = 0; memcpy(&data_len, entry->dgram + 6, 4);
uint8_t* payload = entry->dgram + 10;
if (subcmd == 0x02) { // REPLY
if (seq != (uint32_t)reply_rcvd) {
printf("[FAIL] client: reply seq mismatch expected=%u got=%u\n", (uint32_t)reply_rcvd, seq);
g_test_done = -1;
} else if (data_len > 0 && memcmp(payload, expected_data, data_len) != 0) {
printf("[FAIL] client: reply data mismatch at seq=%u\n", seq);
g_test_done = -1;
} else {
reply_rcvd++;
}
}
queue_entry_free(entry); queue_dgram_free(entry);
}
// ======================== Loopback test (no ETCP) ========================
static int loop_rcvd = 0;
static int loop_ok = 0;
static void loop_handler(struct ETCP_CONN* conn, struct ll_entry* entry) {
(void)conn;
if (entry && entry->dgram && entry->len >= 6) {
loop_rcvd++;
if (entry->dgram[1] == 0xAA && entry->dgram[2] == 0xBB && entry->dgram[3] == 0xCC) loop_ok = 1;
}
if (entry) { queue_entry_free(entry); queue_dgram_free(entry); }
}
static int test_loopback(void) {
loop_rcvd = loop_ok = 0;
etcp_router_bind(srv, 0xF0, loop_handler);
uint8_t data[6] = { 0xF0, 0xAA, 0xBB, 0xCC, 0x00, 0x00 };
struct ll_entry* e = queue_entry_new(0);
e->dgram = u_malloc(6); memcpy(e->dgram, data, 6); e->len = 6;
etcp_route_send(srv, srv->node_id, e, 0); // loopback
etcp_router_unbind(srv, 0xF0);
if (loop_rcvd != 1 || !loop_ok) {
printf("[FAIL] loopback: rcvd=%d ok=%d\n", loop_rcvd, loop_ok);
return 1;
}
printf(" loopback: OK\n");
return 0;
}
// ======================== Test API bind/unbind ========================
static int test_api(void) {
if (etcp_router_bind(srv, 0xEE, loop_handler) != 0) { printf("[FAIL] bind\n"); return 1; }
if (etcp_router_bind(srv, 0xEE, loop_handler) != 0) { printf("[FAIL] rebind (overwrite)\n"); etcp_router_unbind(srv, 0xEE); return 1; }
if (etcp_router_unbind(srv, 0xEE) != 0) { printf("[FAIL] unbind\n"); return 1; }
if (etcp_router_unbind(srv, 0xEE) == 0) { printf("[FAIL] double unbind should fail\n"); return 1; }
// Invalid args:
if (etcp_router_bind(NULL, 0, NULL) == 0) { printf("[FAIL] bind null\n"); return 1; }
if (etcp_router_bind(srv, 0xEE, NULL) == 0) { printf("[FAIL] bind null cb\n"); return 1; }
printf(" api bind/unbind: OK\n");
return 0;
}
// ======================== Monitor & sender ========================
static uint64_t dedup_bgp_log = 0;
static void monitor(void* arg) {
(void)arg;
if (g_test_done) { g_mon_id = NULL; return; }
static int conn_ok = 0, conn_delay = 0;
if (!conn_ok) {
if (conn_established(srv) && conn_established(cli)) {
conn_delay++;
if (conn_delay < 40) { g_mon_id = uasync_set_timeout(ua, 10, NULL, monitor, "mon"); return; }
conn_ok = 1;
printf(" connections established\n");
// Run API tests + loopback
if (test_api() != 0) { g_test_done = -1; return; }
if (test_loopback() != 0) { g_test_done = -1; return; }
// Bind handlers
etcp_router_bind(srv, TEST_SVC_ID, srv_handler);
etcp_router_bind(cli, TEST_SVC_ID, cli_handler);
// Generate shared random data
for (int i = 0; i < MAX_PAYLOAD; i++) expected_data[i] = (uint8_t)(rand() & 0xFF);
g_phase = 1;
printf(" sending %d packets client→server...\n", TOTAL_PACKETS);
fflush(stdout);
}
}
// Phase 1: send forward
if (g_phase == 1 && fwd_sent < TOTAL_PACKETS) {
int data_len = 16 + (fwd_sent % 32);
uint8_t buf[10 + MAX_PAYLOAD];
buf[0] = TEST_SVC_ID;
buf[1] = 0x01; // DATA subcmd
uint32_t seq = fwd_sent;
memcpy(buf + 2, &seq, 4);
memcpy(buf + 6, &data_len, 4);
memcpy(buf + 10, expected_data, data_len);
struct ll_entry* e = queue_entry_new(0);
if (e) { e->dgram = u_malloc(10 + data_len); memcpy(e->dgram, buf, 10 + data_len); e->len = 10 + data_len;
if (etcp_route_send(cli, server_node_id, e, 0) == 0) fwd_sent++;
else { queue_entry_free(e); queue_dgram_free(e); }
}
}
if (g_phase == 1 && fwd_sent >= TOTAL_PACKETS && fwd_rcvd >= TOTAL_PACKETS && reply_sent >= TOTAL_PACKETS) {
g_phase = 2;
printf(" forward phase done: sent=%d rcvd=%d reply_sent=%d\n", fwd_sent, fwd_rcvd, reply_sent);
}
if (g_phase == 2 && reply_rcvd >= TOTAL_PACKETS) {
printf(" reply phase done: rcvd=%d\n", reply_rcvd);
g_test_done = 1;
return;
}
g_mon_id = uasync_set_timeout(ua, 10, NULL, monitor, "mon");
}
static void timeout(void* arg) {
(void)arg;
if (!g_test_done) { printf("[FAIL] timeout: sent=%d rcvd=%d reply_sent=%d reply_rcvd=%d\n",
fwd_sent, fwd_rcvd, reply_sent, reply_rcvd);
g_test_done = -1; }
if (g_mon_id) { uasync_cancel_timeout(ua, g_mon_id); g_mon_id = NULL; }
}
// ======================== Main ========================
int main(void) {
if (test_mkdtemp(temp_dir) != 0) { fprintf(stderr, "mkdtemp fail\n"); return 1; }
snprintf(server_conf, sizeof(server_conf), "%s/server.conf", temp_dir);
snprintf(client_conf, sizeof(client_conf), "%s/client.conf", temp_dir);
FILE* f = fopen(server_conf, "w");
if (!f) { fprintf(stderr, "fopen fail\n"); test_rmdir(temp_dir); return 1; }
fprintf(f, "%s", srv_cfg); fclose(f);
f = fopen(client_conf, "w");
if (!f) { fprintf(stderr, "fopen fail\n"); test_unlink(server_conf); test_rmdir(temp_dir); return 1; }
fprintf(f, "%s", cli_cfg); fclose(f);
printf("=== test_etcp_router ===\n");
debug_config_init();
debug_set_level(DEBUG_LEVEL_ERROR);
debug_set_categories(DEBUG_CATEGORY_ALL);
utun_instance_set_tun_init_enabled(0);
srand((unsigned)time(NULL));
ua = uasync_create();
if (!ua) { printf("[FAIL] uasync_create\n"); goto done; }
srv = utun_instance_create(ua, server_conf);
if (!srv || utun_instance_init(srv) < 0) { printf("[FAIL] server create\n"); goto done; }
cli = utun_instance_create(ua, client_conf);
if (!cli || utun_instance_init(cli) < 0) { printf("[FAIL] client create\n"); goto done; }
g_mon_id = uasync_set_timeout(ua, 100, NULL, monitor, "mon");
void* to_id = uasync_set_timeout(ua, TEST_TIMEOUT_MS * 10, NULL, timeout, "to");
while (!g_test_done) uasync_poll(ua, 100);
if (to_id) uasync_cancel_timeout(ua, to_id);
if (g_mon_id) uasync_cancel_timeout(ua, g_mon_id);
if (g_test_done == 1) {
// Check all statistics
if (fwd_sent == TOTAL_PACKETS && fwd_rcvd == TOTAL_PACKETS &&
reply_sent == TOTAL_PACKETS && reply_rcvd == TOTAL_PACKETS) {
printf("[PASS] test_etcp_router — %d packets forwarded, %d replied\n", fwd_rcvd, reply_rcvd);
g_ok = 1;
} else {
printf("[FAIL] incomplete: fwd_sent=%d fwd_rcvd=%d reply_sent=%d reply_rcvd=%d\n",
fwd_sent, fwd_rcvd, reply_sent, reply_rcvd);
}
} else {
printf("[FAIL] test did not complete\n");
}
etcp_router_unbind(srv, TEST_SVC_ID);
etcp_router_unbind(cli, TEST_SVC_ID);
done:
if (srv) { srv->running = 0; utun_instance_destroy(srv); }
if (cli) { cli->running = 0; utun_instance_destroy(cli); }
if (ua) uasync_destroy(ua, 0);
test_unlink(server_conf); test_unlink(client_conf); test_rmdir(temp_dir);
return g_ok ? 0 : 1;
}
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